Light without any Light/Environnement with EEVEE
I experienced the same results when I tried to create an empty night scene without any light.
Even without any light in the scene, the &quot;False Color&quot; View Transforms showed that the polygons were lit in EEVEE... However, the render in Cycles was completely black.
I solved my issue by pressing &quot;Bake Indirect Lighting&quot; then &quot;Delete Lighting Cache&quot; and everything became black again in EEVEE and Cycles.